19109223 has 16 divisors (see below), whose sum is σ = 32354560. Its totient is φ = 10919448.

The previous prime is 19109219. The next prime is 19109249. The reversal of 19109223 is 32290191.

It is not a de Polignac number, because 19109223 - 2² = 19109219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19109263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50365 + ... + 50742.

It is an arithmetic number, because the mean of its divisors is an integer number (2022160).

Almost surely, 2^19109223 is an apocalyptic number.

19109223 is a deficient number, since it is larger than the sum of its proper divisors (13245337).

19109223 is a wasteful number, since it uses less digits than its factorization.

19109223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101123 (or 101117 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 19109223 is about 4371.4097268501. The cubic root of 19109223 is about 267.3505054582.

The spelling of 19109223 in words is "nineteen million, one hundred nine thousand, two hundred twenty-three".